{"api_version":"1","generated_at":"2026-04-19T01:10:20+00:00","cve":"CVE-2026-31425","urls":{"html":"https://cve.report/CVE-2026-31425","api":"https://cve.report/api/cve/CVE-2026-31425.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31425","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31425"},"summary":{"title":"rds: ib: reject FRMR registration before IB connection is established","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nrds: ib: reject FRMR registration before IB connection is established\n\nrds_ib_get_mr() extracts the rds_ib_connection from conn->c_transport_data\nand passes it to rds_ib_reg_frmr() for FRWR memory registration. On a\nfresh outgoing connection, ic is allocated in rds_ib_conn_alloc() with\ni_cm_id = NULL because the connection worker has not yet called\nrds_ib_conn_path_connect() to create the rdma_cm_id. When sendmsg() with\nRDS_CMSG_RDMA_MAP is called on such a connection, the sendmsg path parses\nthe control message before any connection establishment, allowing\nrds_ib_post_reg_frmr() to dereference ic->i_cm_id->qp and crash the\nkernel.\n\nThe existing guard in rds_ib_reg_frmr() only checks for !ic (added in\ncommit 9e630bcb7701), which does not catch this case since ic is allocated\nearly and is always non-NULL once the connection object exists.\n\n KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]\n RIP: 0010:rds_ib_post_reg_frmr+0x50e/0x920\n Call Trace:\n  rds_ib_post_reg_frmr (net/rds/ib_frmr.c:167)\n  rds_ib_map_frmr (net/rds/ib_frmr.c:252)\n  rds_ib_reg_frmr (net/rds/ib_frmr.c:430)\n  rds_ib_get_mr (net/rds/ib_rdma.c:615)\n  __rds_rdma_map (net/rds/rdma.c:295)\n  rds_cmsg_rdma_map (net/rds/rdma.c:860)\n  rds_sendmsg (net/rds/send.c:1363)\n  ____sys_sendmsg\n  do_syscall_64\n\nAdd a check in rds_ib_get_mr() that verifies ic, i_cm_id, and qp are all\nnon-NULL before proceeding with FRMR registration, mirroring the guard\nalready present in rds_ib_post_inv(). Return -ENODEV when the connection\nis not ready, which the existing error handling in rds_cmsg_send() converts\nto -EAGAIN for userspace retry and triggers rds_conn_connect_if_down() to\nstart the connection worker.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-13 14:16:12","updated_at":"2026-04-18 09:16:32"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/a54ecccfae62c5c85259ae5ea5d9c20009519049","name":"https://git.kernel.org/stable/c/a54ecccfae62c5c85259ae5ea5d9c20009519049","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c506456ebf84c50ed9327473d4e9bd905def212b","name":"https://git.kernel.org/stable/c/c506456ebf84c50ed9327473d4e9bd905def212b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/450ec93c0f172374acbf236f1f5f02d53650aa2d","name":"https://git.kernel.org/stable/c/450ec93c0f172374acbf236f1f5f02d53650aa2d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6b0a8de67ac0c74e1a7df92b73c862cb36780dfc","name":"https://git.kernel.org/stable/c/6b0a8de67ac0c74e1a7df92b73c862cb36780dfc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/47de5b73db3b88f45c107393f26aeba26e9e8fae","name":"https://git.kernel.org/stable/c/47de5b73db3b88f45c107393f26aeba26e9e8fae","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/23e07c340c445f0ebff7757ba15434cb447eb662","name":"https://git.kernel.org/stable/c/23e07c340c445f0ebff7757ba15434cb447eb662","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a5bfd14c9a299e6db4add4440430ee5e010b03ad","name":"https://git.kernel.org/stable/c/a5bfd14c9a299e6db4add4440430ee5e010b03ad","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/82e4a3b56b23b844802056c9e75a39d24169b0a4","name":"https://git.kernel.org/stable/c/82e4a3b56b23b844802056c9e75a39d24169b0a4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31425","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31425","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1659185fb4d0025835eb2058a141f0746c5cab00 c506456ebf84c50ed9327473d4e9bd905def212b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1659185fb4d0025835eb2058a141f0746c5cab00 82e4a3b56b23b844802056c9e75a39d24169b0a4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1659185fb4d0025835eb2058a141f0746c5cab00 450ec93c0f172374acbf236f1f5f02d53650aa2d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1659185fb4d0025835eb2058a141f0746c5cab00 6b0a8de67ac0c74e1a7df92b73c862cb36780dfc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1659185fb4d0025835eb2058a141f0746c5cab00 a5bfd14c9a299e6db4add4440430ee5e010b03ad git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1659185fb4d0025835eb2058a141f0746c5cab00 23e07c340c445f0ebff7757ba15434cb447eb662 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1659185fb4d0025835eb2058a141f0746c5cab00 47de5b73db3b88f45c107393f26aeba26e9e8fae git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1659185fb4d0025835eb2058a141f0746c5cab00 a54ecccfae62c5c85259ae5ea5d9c20009519049 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.6","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.6 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.253 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.203 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.168 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.134 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.81 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.22 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.12 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"31425","cve":"CVE-2026-31425","epss":"0.000240000","percentile":"0.066100000","score_date":"2026-04-18","updated_at":"2026-04-19 00:10:43"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/rds/ib_rdma.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c506456ebf84c50ed9327473d4e9bd905def212b","status":"affected","version":"1659185fb4d0025835eb2058a141f0746c5cab00","versionType":"git"},{"lessThan":"82e4a3b56b23b844802056c9e75a39d24169b0a4","status":"affected","version":"1659185fb4d0025835eb2058a141f0746c5cab00","versionType":"git"},{"lessThan":"450ec93c0f172374acbf236f1f5f02d53650aa2d","status":"affected","version":"1659185fb4d0025835eb2058a141f0746c5cab00","versionType":"git"},{"lessThan":"6b0a8de67ac0c74e1a7df92b73c862cb36780dfc","status":"affected","version":"1659185fb4d0025835eb2058a141f0746c5cab00","versionType":"git"},{"lessThan":"a5bfd14c9a299e6db4add4440430ee5e010b03ad","status":"affected","version":"1659185fb4d0025835eb2058a141f0746c5cab00","versionType":"git"},{"lessThan":"23e07c340c445f0ebff7757ba15434cb447eb662","status":"affected","version":"1659185fb4d0025835eb2058a141f0746c5cab00","versionType":"git"},{"lessThan":"47de5b73db3b88f45c107393f26aeba26e9e8fae","status":"affected","version":"1659185fb4d0025835eb2058a141f0746c5cab00","versionType":"git"},{"lessThan":"a54ecccfae62c5c85259ae5ea5d9c20009519049","status":"affected","version":"1659185fb4d0025835eb2058a141f0746c5cab00","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/rds/ib_rdma.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.6"},{"lessThan":"4.6","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.253","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.168","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.134","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.81","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.22","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.253","versionStartIncluding":"4.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.203","versionStartIncluding":"4.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.168","versionStartIncluding":"4.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.134","versionStartIncluding":"4.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.81","versionStartIncluding":"4.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.22","versionStartIncluding":"4.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.12","versionStartIncluding":"4.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"4.6","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nrds: ib: reject FRMR registration before IB connection is established\n\nrds_ib_get_mr() extracts the rds_ib_connection from conn->c_transport_data\nand passes it to rds_ib_reg_frmr() for FRWR memory registration. On a\nfresh outgoing connection, ic is allocated in rds_ib_conn_alloc() with\ni_cm_id = NULL because the connection worker has not yet called\nrds_ib_conn_path_connect() to create the rdma_cm_id. When sendmsg() with\nRDS_CMSG_RDMA_MAP is called on such a connection, the sendmsg path parses\nthe control message before any connection establishment, allowing\nrds_ib_post_reg_frmr() to dereference ic->i_cm_id->qp and crash the\nkernel.\n\nThe existing guard in rds_ib_reg_frmr() only checks for !ic (added in\ncommit 9e630bcb7701), which does not catch this case since ic is allocated\nearly and is always non-NULL once the connection object exists.\n\n KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]\n RIP: 0010:rds_ib_post_reg_frmr+0x50e/0x920\n Call Trace:\n  rds_ib_post_reg_frmr (net/rds/ib_frmr.c:167)\n  rds_ib_map_frmr (net/rds/ib_frmr.c:252)\n  rds_ib_reg_frmr (net/rds/ib_frmr.c:430)\n  rds_ib_get_mr (net/rds/ib_rdma.c:615)\n  __rds_rdma_map (net/rds/rdma.c:295)\n  rds_cmsg_rdma_map (net/rds/rdma.c:860)\n  rds_sendmsg (net/rds/send.c:1363)\n  ____sys_sendmsg\n  do_syscall_64\n\nAdd a check in rds_ib_get_mr() that verifies ic, i_cm_id, and qp are all\nnon-NULL before proceeding with FRMR registration, mirroring the guard\nalready present in rds_ib_post_inv(). Return -ENODEV when the connection\nis not ready, which the existing error handling in rds_cmsg_send() converts\nto -EAGAIN for userspace retry and triggers rds_conn_connect_if_down() to\nstart the connection worker."}],"providerMetadata":{"dateUpdated":"2026-04-18T08:59:40.222Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/c506456ebf84c50ed9327473d4e9bd905def212b"},{"url":"https://git.kernel.org/stable/c/82e4a3b56b23b844802056c9e75a39d24169b0a4"},{"url":"https://git.kernel.org/stable/c/450ec93c0f172374acbf236f1f5f02d53650aa2d"},{"url":"https://git.kernel.org/stable/c/6b0a8de67ac0c74e1a7df92b73c862cb36780dfc"},{"url":"https://git.kernel.org/stable/c/a5bfd14c9a299e6db4add4440430ee5e010b03ad"},{"url":"https://git.kernel.org/stable/c/23e07c340c445f0ebff7757ba15434cb447eb662"},{"url":"https://git.kernel.org/stable/c/47de5b73db3b88f45c107393f26aeba26e9e8fae"},{"url":"https://git.kernel.org/stable/c/a54ecccfae62c5c85259ae5ea5d9c20009519049"}],"title":"rds: ib: reject FRMR registration before IB connection is established","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31425","datePublished":"2026-04-13T13:40:28.911Z","dateReserved":"2026-03-09T15:48:24.088Z","dateUpdated":"2026-04-18T08:59:40.222Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-13 14:16:12","lastModifiedDate":"2026-04-18 09:16:32","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31425","Ordinal":"1","Title":"rds: ib: reject FRMR registration before IB connection is establ","CVE":"CVE-2026-31425","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31425","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nrds: ib: reject FRMR registration before IB connection is established\n\nrds_ib_get_mr() extracts the rds_ib_connection from conn->c_transport_data\nand passes it to rds_ib_reg_frmr() for FRWR memory registration. On a\nfresh outgoing connection, ic is allocated in rds_ib_conn_alloc() with\ni_cm_id = NULL because the connection worker has not yet called\nrds_ib_conn_path_connect() to create the rdma_cm_id. When sendmsg() with\nRDS_CMSG_RDMA_MAP is called on such a connection, the sendmsg path parses\nthe control message before any connection establishment, allowing\nrds_ib_post_reg_frmr() to dereference ic->i_cm_id->qp and crash the\nkernel.\n\nThe existing guard in rds_ib_reg_frmr() only checks for !ic (added in\ncommit 9e630bcb7701), which does not catch this case since ic is allocated\nearly and is always non-NULL once the connection object exists.\n\n KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]\n RIP: 0010:rds_ib_post_reg_frmr+0x50e/0x920\n Call Trace:\n  rds_ib_post_reg_frmr (net/rds/ib_frmr.c:167)\n  rds_ib_map_frmr (net/rds/ib_frmr.c:252)\n  rds_ib_reg_frmr (net/rds/ib_frmr.c:430)\n  rds_ib_get_mr (net/rds/ib_rdma.c:615)\n  __rds_rdma_map (net/rds/rdma.c:295)\n  rds_cmsg_rdma_map (net/rds/rdma.c:860)\n  rds_sendmsg (net/rds/send.c:1363)\n  ____sys_sendmsg\n  do_syscall_64\n\nAdd a check in rds_ib_get_mr() that verifies ic, i_cm_id, and qp are all\nnon-NULL before proceeding with FRMR registration, mirroring the guard\nalready present in rds_ib_post_inv(). Return -ENODEV when the connection\nis not ready, which the existing error handling in rds_cmsg_send() converts\nto -EAGAIN for userspace retry and triggers rds_conn_connect_if_down() to\nstart the connection worker.","Type":"Description","Title":"rds: ib: reject FRMR registration before IB connection is establ"}]}}}